Question: A two-way table is shown for two groups, 1 and 2, and two possible outcomes, A and B. In each case, (a) What proportion of

A two-way table is shown for two groups, 1 and 2, and two possible outcomes, A and B. In each case,


Group 1 Group 2 Total Outcome A Outcome B Total 100 100


(a) What proportion of all cases had Outcome A? 


(b) What proportion of all cases are in Group 1?


(c) What proportion of cases in Group 1 had Outcome B? 


(d) What proportion of cases who had Outcome A were in Group 2?

Group 1 Group 2 Total Outcome A Outcome B Total 100 100 200 20 60 80 80 40 120

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